Attachment for grain binders



May 24; 1927.

B. H. BURA ATTACHMENT FOR GRAIN BINDERS Filed June 24, 1925 2 Sheets-Sheet 1 /3./7Bura May 24 1927. 1 1,629,610

- B. H. BURA ATTACHMENT FOR GRAIN BINDERS Filed June 2 1925 2 Sheets-Sheet 2 I \1 mg i a gnvmfioa fifffiara aw y? a rut or groove Patented May 24, 192?.

enn anmmn. Brian, or KBEMLIN, OKLAHOMA;

ATTACHMENT :FOR GRAIN IBINDEBS.

Application filed June 24, 1325.. Serial no. 39,333.

, This invention is'an attachment for grain binders and has for its object the provision of simple means wh'erebythe binding twine will be prevented from fouling in the jaws of the knotter. In grain binders, as at present constructecha stationary pin or twine" support is provided above the knotter and the twine runs over this pinin passing to the knotter. As the pin or finger is stationary, the twine passes constantly over the same spot on the finger therein which prevents the twine'from slipping off the end of the finger properly, the result being that the twine is not properly held within the jawsof the knotter and tends constantly to foul over the jaws and around the knotter. The object of my invention, movable support for the twine above the knotter so that the twine rests upon a different point of the support at each opera tion, and a further object of the invention is to provide means whereby the movable support will be automatically operated in consonance with the kicker arm of the binder mechanism. These stated objects, and other objects which will incidentally hereinafter app'ear, are attained in such a mechanismas is illustrated in the accompanying drawings, and the invention. resides in certain novel features which will be particularly pointed out in the appended claims.

In the drawings:

Figure 1 is a side elevation of. a portion of the bindingmechanism with my attachment in position thereon;

' Fig. 2 is a plan view of the same;

Fig. 3 is a detail section on the line 38 of Fig.2, and

Fig. 4 is a detail perspective view of the cam which is carried by the kicker arm.

In the drawings, the reference numeral. 1 indicates the knotter support upon which the kicker arm 2 is mounted in the usual manner and a portion of the knotter mechanism is indicated at 3. The supporting element 1 is provided at its sides with upstanding longitudinal flanges 1 and between its sides is provided with a longitudinal slot 5 through which the binder twine. indicated at 6. passes to the knotter. Upon the inner side of one flange 4; is secured a guide bracket 7 in which is slidably mounted a pin or finger 8, the inner end of said finger proj ecting across the slot 5 to support the twine as it passes to the knotter, as will be underand frequently wears therefore, is to provide a stood on referenceto Figs. 2 and 3. The said pin or finger 8 is-yieldably held across the slot 5 by a spring. 9, coil-ed around the pin within theguide bracket 7 and bearing at one end against the flange 4 and at its opposite end against an abutment 10. on the pin, the said abutment serving to prevent the pinror finger being' projected from the bracketb engaging the inner end of the bracket,'as will be understood upon reference to Fig. 3. The outer end of the pin is slidably engaged through an opening provfdedtherefor in the flange land at the outer side of the flange is turned rearwardly, asshown at 11. This rearwardly turned terminal or hook 11 is engaged in the downturned rear end 12 of a lever or rocking arm 13 which is fulcrumed upon a bracket 1 k secured upon the outer side of the flange i in proximity to the outer end of the pin or finger, as shown. Theforward end of' this lever or rocking arm is arranged to be engaged by a cam 15 secured to the kicker arm 2 above the kicker shaft and obviously caused to movewith thekicker'arin. reduce the wear; incident to impact of the cam upon the free end of the lever or rocking arm, an anti-friction device 16 is mounted upon the arm adjacent the free end thereof, as clearly shown in Figs. 1 and 2.

- The action of myattachment will, it is.

thought, be readily understood from the foregoing description, taken in connection with the accompanying drawings. The binding and knotting mechanism operates in exactly the same manner as in binders as now constructed and the kicker arm 2 is rotated at proper intervals to eject the bound bundles. Normally the spring 9 is expanded so that the pin or finger 8 is held in the twine-supporting position illustrated inv the drawings and the rocking arm or lever 13 is held in the position indicated in Fig. 2 so that, when the cam 15 1s swungdownwardly and rearwardly with the kicker arm, the side of the cam will ride upon the side of the lever at the free end thereof and press the same toward the knotter support 1, thereby rockim lever outwardly and pulling the pin or finger 8 from the twine. YVhen the cam 15 clears the lever or the bearing .16 thereon, the spring 9 at once expands so. as to return the parts to the normal position supporting the twine. The cam 15 is so shaped and timed t a a t e n edle ot shown) swings g the rear end of the upwardly and outwardly to complete the loop about the bundle the kicker arm rocks toward its bundle-engaging position and causes the pin to be withdrawn to release the twine. The turning of the kicker arm and the cam continues, however, so that the pin will move inwardly to again support the twine just as the needle passes onits return movement. I

It will be noted that I have provided an exceedingly simple, compact and automatic device whereby a new path willbeprovided for the twine at each operation so that the twine will always be held in proper relation to the knotter jaws and will be, therefore, prevented from fouling in the jaws or wrapping around the knotter. The device may be applied to binders now in existence at a slight cost and will operate eificiently at all i times, requiring minimum attention for ad justment or repairs.

Having thus described the invention, T claim:

1. In a structure of the character described, a knotter support having a longitudinally extending slot intermediate its width and an upstanding side flange, knotter mechanism carried by said support, a rotatable kicker shaft carried by said knotter mechanism a kicker arm carried by and projecting transversely from said shaft, a bracket secured transversely upon the support at one side of said slot, a twine-supporting finger slidably mounted in said bracket and having one end portion extend in in crossed relation to the slot and its I tree and its rear end engaged with the last mentioned end of said finger, an expansion spring housed in said bracket and acting upon the finger to hold it normally projected across the slot in twine-supporting position,

and a cam carried by the kicker arm and disposedabout said kicker shaft and hearing upon the outerside of the free end of the rocker arm and adapted to rock said arm laterally and thereby withdraw the finger from a twine-supporting position.

2. An attachment for a binder comprising a bracket adapted to be secured upon a knotter S111 porting breast plate transversely of a twine slot formed longitudinally therein, a twine supporting pin slidabl'e through Stilt bracket and having a projected end portion to extend across the twine slot,1 a cam adapted to be secured to a kicker arm eoncentrie to a rotary shaft carrying the kicker arm, a fulcrum secured to said breast plate; and a rocker arm pivoted intermediateits length upon said fulcrum and having one end engaged with said pinand its other end adapted to engage said cam whereby saidpin may be moved into and out of a twine supporting position in timed relation to movement ofthekioker arm.

In testimony whereof I afiix my signature.

BENJ H. BURA. a 5.

adapted to be 

